Food Engineering
Behnaz Vafania; Milad Fathi; Sabiheh Soleimanian Zad
Abstract
The aim of this research was to investigate the efficiency of nozzle-less electrospinning for encapsulation of ajwain essential oil (as a hydrophobic bioactive) using two hydrocolloids (chitosan/gelatin) in order to enhance its antioxidant properties and stability for food applications. Nanofibers were ...
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The aim of this research was to investigate the efficiency of nozzle-less electrospinning for encapsulation of ajwain essential oil (as a hydrophobic bioactive) using two hydrocolloids (chitosan/gelatin) in order to enhance its antioxidant properties and stability for food applications. Nanofibers were spun using chitosan/gelatin in ratios of 1:6, 1:8 and 1:10 and ajwain concentrations of 20 and 40%. Solution properties (i.e. viscosity and electrical conductivity) were measured. Encapsulation efficiency and loading capacity data illustrated an enhancement with increasing of essential oil concentration. Fibers diameter and morphology were studied by scanning electron microscopy (SEM). The chitosan/gelatin nanofibers with ratio of 1:6 containing 40% essential oil had the highest encapsulation efficiency (99.9%), loading capacity (39.9%) and the smallest diameter (146 nm). Attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) proved that during electrospinning, no any chemical interaction was occurred between ingredients and differential scanning calorimetry (DSC) data showed that essential oil was well encapsulated in nanofibers. Antioxidant properties were analyzed by 2,2-diphenyl-1-picrylhydrazylradical and approved the efficiency of encapsulation for protection of antioxidants.
Masoumeh Ghotbi; Sabiheh Soleimanian Zad; Mahmoud Sheikh-Zeinoddin
Abstract
Facultative Heterofermentative Lactobacilli (FHL) are responsible for enhancing unique flavour properties in traditional dairy products such as Lighvan cheese through biochemical mechanisms. In addition to saving domestic genetic resources, industrial production of semi-traditional dairy products is ...
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Facultative Heterofermentative Lactobacilli (FHL) are responsible for enhancing unique flavour properties in traditional dairy products such as Lighvan cheese through biochemical mechanisms. In addition to saving domestic genetic resources, industrial production of semi-traditional dairy products is one of the major objectives of non starter microflora identification in indigenous dairy products. In this study performed on the Lighvan cheese at 4 months ripening period Based on morphologicaland biochemical methods were identified Lb. plantarum group (Lb.pentosus, Lb. plantarum, Lb. paraplantarum) and Lb. casei group ( Lb. casei, Lb. paracasei) .Moreove the development of the FHL in Lighvan cheese varied according to ripening time.Keywords: Lighvan cheese, Lactobacillus plantarum, Lactobacillus casei
